The Basic Principles of Particle Size Analysis | Malvern Panalytical

Date d'enregistrement: February 16 2017

Duration: 01 hours 05 minutes 49 seconds

Understanding the basic principles of any analytical technique is vital in providing the fundamental building blocks on which to expand one’s knowledge. Within particle size analysis one short document has proven very popular over the years - “The Basic Principles of Particle Size Analysis". This has been Malvern Instruments' most popular document in both digital and paper formats. It was first written in 1993 (based on an earlier conference submission) and has been revised on a couple of occasions.

This webinar will be based on that Basics document and will be presented by the author of that document – Dr Alan Rawle. In line with that document the webinar will introduce you to the basics of particle sizing including:
• Terminology
• International standards
• Math – what the important numbers on the analysis report mean
• Outline of the main techniques (sieves, sedimentation, electrical sensing zone)
• Other techniques (SAXS, NTA, RMM)
• Overview of light scattering techniques - in particular, Dynamic light scattering (DLS) and Laser diffraction

Table of contents

1. Welcome

00:11

2. Introduction

01:37

3. The Basic Principles of Particle Size Analysis

00:21

4. Abstract

00:26

5. Earliest history

00:05

6. The history – later editions. Note the number of views…And the outdated picture….

00:33

7. Printed form

01:16

8. The PRA conference in January1994 - 1

00:29

9. So the coatings application note actually came first….

00:48

10. It’s popular!

00:26

11. Languages….

00:26

12. Overview

01:24

13. Average American college student

00:47

14. Harold Heywood (1905 – 1971)

01:02

15. Brian Scarlett

00:52

16. Basic principles

01:55

17. Basic principles

00:41

18. Basic principles

01:00

19. Basic principlesEquivalent sphere - volume/mass

00:50

20. Basic principlesEquivalent sphere - surface area

00:55

21. Basic principles

00:38

22. Basic principles

01:05

23. Basic principles

00:56

24. Number - Length mean

01:18

25. Number - Surface Area mean

01:18

26. Number - Volume/Mass mean

01:13

27. Difficulties with the number means

01:32

28. (Wait a)….Moment Means

01:07

29. Surface Area Moment MeanD[3, 2]

01:06

30. Volume/Mass Moment MeanD[4, 3]

01:32

31. Volume Moment Mean

00:45

32. Volume Moment Mean - D[4, 3]

00:30

33. Practical Example

00:59

34. Practical Example

01:08

35. Practical Example

00:47

36. Basic principles – mean summary

01:24

37. Conversion between means and distributions

00:55

38. Basic principles

00:53

39. Number and volume- objects in space

01:49

40. Particle Counting and Particle Size Analysis

00:57

41. Particle Size Analysis

00:20

42. Techniques

00:16

43. Untitled

00:50

44. Sieves

00:33

45. Sieves

01:31

46. Sieves

00:08

47. Sieves

00:44

48. Sieving

00:43

49. Microscopy/Image analysis

02:05

50. Microscopy/Image analysis

01:07

51. Microscopy/Image analysis

01:09

52. Electrical Sensing Zone - (Coulter Counter)

00:54

53. Untitled

00:05

54. Electrical Sensing Zone - (Coulter Counter)

00:49

55. Electrical Sensing Zone - (Coulter Counter)

00:39

56. Gas adsorption techniques (BET)

01:51

57. Small-angle X-ray scattering (SAXS)

01:02

58. Nanoparticle Tracking Analysis (NTA)

00:25

59. Resonant Mass Measurement – ArchimedesSee: https://www.youtube.com/watch?v=w26l31Fv_4Y

00:46

60. Light scattering

00:30

61. Why laser diffraction?

00:38

62. Measurement principle

00:44

63. Untitled

00:25

64. Halo around moon http://apod.nasa.gov/apod/ap030421.html

00:08

65. Size of droplets

00:24

66. Variation of scattering angle with particle size

00:33

67. So what happens when the size gets small?x < l/10

00:49

68. Just one photon

00:23

69. Slide69

00:00

70. Dynamic Light Scattering

00:21

71. Correlation functions for different particle sizes

00:24

72. Calculating size distributions from the correlation functions

00:27

73. Thank you

00:40

74. Thank you for your attentionAny questions?

04:46

75. Contact Information

00:44

76. AppendixReferences

00:00

77. AppendixReferences

00:00

78. AppendixReferences

00:00

79. AppendixReferences

00:00

80. The ISO terminology for particle size

00:00

81. The ISO terminology for particle size (in progress)

00:00

82. AppendixBasics – Internet material

00:00

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